JPH01141756A - Micro hole inserting positioner - Google Patents

Abstract

PURPOSE:To enable positioning between a micro hole of an inserting object and an inserted material to be directly performed, by forming a pinhole of a pinhole camera by a hole itself through which the inserted material is passed. CONSTITUTION:A light source 1-8 for irradiating a top of an inserted material 1-7 by moving simultaneously with motion of this top is provided. A pinhole camera 1-3 using a micro hole 1-9 into which this inserted material 1-7 is inserted as a pinhole is provided, and the inserted material 1-7 irradiated by this light source 1-8 photographed with the pinhole camera 1-3 to perform positioning. Since a depth of field 1-5 is deep in that case, a position of its top can be always traced even while the inserted material 1-7 is being moved.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a microhole insertion positioning device used when inserting a relatively hard needle-like insert into a thin plate-like microhole. In particular, it is suitable for use as a positioning device for inserting small holes, such as when assembling a printer head, and for inserting small parts.

[Prior art] Conventional positioning devices for micro-hole insertion include those that position the insert by imaging it from two directions with two cameras (Fig. 4), and those that position the insert by capturing images from two directions with two cameras, and those that use mechanical accuracy when moving the insert. In some cases, the positioning was performed by raising the insert, and in others, a camera was placed on the side of the insert to determine the position of the minute hole.

FIG. 4 is a schematic diagram when a camera is used in a conventional positioning device for microhole insertion.

When using two cameras 4-1, insert the object 4-
2 and insertion hole 4-3, positioning was performed by arranging them at two locations other than 14 in the insertion direction.

Another method is to use only one camera and position it from the direction of the arrow in the figure, but this is difficult in reality because the depth of field is shallow.

[Problems to be Solved] The above-mentioned conventional positioning device for microhole insertion has the following problems because it does not directly position the microhole to be inserted and the insert.

■In the case of needle-shaped inserts such as printer head wire, it is difficult to mechanically achieve the positional accuracy of the tip.

■When using two cameras, when inserting a large number of wires through a small space, they become crowded and positioning becomes impossible. Therefore, it cannot be used for assembling printer heads or small electronic devices.

The present invention has been made in view of the above-mentioned problems, and is a positioning system for inserting into microscopic holes that can be used even when inserting a large number of wires through a microscopic space, and can also be used to insert small parts such as when assembling a printer head. The purpose is to provide equipment.

[Means for Solving Problems] In order to achieve the above object, the positioning device for microhole insertion of the present invention includes a light source that illuminates the tip of the insert, and a pin that defines the microhole into which the insert is inserted. This configuration includes a hall camera.

With this configuration, the insert irradiated by the light source is imaged and positioned by the pinhole camera.

[Example] Hereinafter, the present invention will be explained in detail based on the drawings.

1st rIfJ is a schematic cross-sectional view of a microhole insertion positioning device according to an embodiment of the present invention.

In the figure, 1-1 is a solid-state image sensor with a shutter function, and a light-shielding plate 1 that closes micro holes 1-9 other than those to be inserted.
-2, and constitutes a pinhole camera 1-3. In addition, 1-8 is a light source, and the inserted IFFI
- Move at the same time as the tip of 7 moves and make the tip shine.

As a result of using the principle of a pinhole camera in this way, if the hole to be inserted is minute, the position of the tip of the object to be inserted (image 1-4 of the tip) can be determined with sufficient accuracy as necessary for insertion. can be imaged.

Further, since the depth of field 1-5 is deep, it is possible to trace the position of the tip all the time even during movement.

However, since the pinhole camera is dark, the entire camera is surrounded by a light-shielding plate 1-6 (not shown) in order to improve the S/N ratio. Further, 1-11 is a non-reflective cloth to reduce disturbance.

Note that the solid-state image sensor 1-1 with a shutter function is used because a pinhole camera does not have a light amount adjustment function.

Next, FIG. 2 is a perspective view of the drive stage in the microhole insertion positioning device of FIG. 1.

In this case, on the stage 2-1, there is a holder 2-3 for the wire rod 2-2 (the tilting of the two wheels can be finely controlled), a spot light source (narrow laser slit light or a halogen spot light source) 2-4, and a blank light source. Reflective cloths 2-5 are all installed.

With such a configuration, it is possible to always irradiate the tip of the wire 2-2 with light.

Further, the entire stage 2-1 is driven in the insertion direction by the X-axis table 2-6.

Then, as the X-axis a... 4 is solid-state imaging device 1! will be moved above.

A summary of this is shown in the 31st ffl.

Figures 3(a) to 3(i) are schematic diagrams ``?T'' showing the relationship between the movement of the insert and the image position of the tip on the imaging element.

In the figure, 3-1 is a grooved image sensor, 3-2 is a pinhole, 3-3 is a movement of the insert, 3-4 is an image, and 3-
5 is an insert. Here, for the sake of simplicity, the light shielding plate 1-2 and the minute hole 1-9 in FIG. 1 are collectively shown as a pinhole 3-2.

In addition, the insertion target 3-5 is 3-5 from the position 3-5-1.
Move to position -2 and correspondingly the image of the tip; 3-4
Suppose that the player moves from the position 3-4-1 to 3-4-2.

Note that in order to improve the accuracy of the image position, peak position detection '4:: is performed by multilevel processing, but if a sufficient S/N ratio can be obtained, the center position of the binary image is also sufficient.

The condition under which 'IA O1 insertion is possible is that the image position 3-4 does not move even if the object to be inserted is moved in the direction of the arrow (:l-83). Furthermore, if there is a restriction on the inclination, it can be determined based on the image position a3-4, as is clear from a comparison of FIGS. 3(a) and 3(b). In addition,
The reference of the center 3-6 shown in FIG. 3(a) can be measured by applying a parallel laser beam or the like from the front of the pinhole camera.

Further, depending on the case, it can also be set by checking the insertion state.

[Effects of the Invention] As explained above, the present invention deepens the depth of field by configuring the pinhole camera with the hole itself through which the insertion object is inserted, and also directly detects the hole through which the insertion object is inserted (=pin hole camera). The present invention has the advantage that it is possible to provide a positioning device for micro-hole insertion that allows the positional relationship between the hole and the insert to be determined and allows reliable insertion.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a positioning device for inserting a microscopic hole according to an embodiment of the present invention, FIG. 2 is a perspective view of a drive stage in the positioning device for inserting a microscopic hole in FIG. 1, and FIG.
) to (d) are schematic diagrams showing the relationship between the movement of the insert and the image position of the tip on the imaging element, and FIG. 4 is a schematic diagram when using a camera in a conventional positioning device for microhole insertion. . 1-1: Solid-state image sensor with shutter function 1-2 = Light shielding plate l-3: Pinhole camera l-7: Insert 1-8: Light source 1-10: Microscopic hole to be inserted 2-4 = Spot light source 3- 1: Solid-state imaging device 3-2 = pinhole

Claims (4)

[Claims] (1) Equipped with a light source that illuminates the tip of the insert and a pinhole camera that uses a minute hole into which the insert is inserted as a pinhole, the insert that is irradiated by the light source is inserted into the pinhole. A positioning device for inserting a microscopic hole, which is characterized by positioning by taking an image with a camera. (2) The positioning device for microhole insertion according to claim 1, wherein the pinhole camera has a light-shielding plate that blocks holes other than the microhole to be inserted. (3) The positioning device for microscopic hole insertion according to claim 1 or 2, wherein the pinhole camera uses a solid-state image sensor with a variable shutter function in the light receiving section. (4) Claims 1 to 3, wherein the pinhole camera has a hole position fine adjustment means for finely adjusting the position of the microscopic hole to be inserted, and the positioning is performed by correcting this fine adjustment. The positioning device for microhole insertion according to any one of the above items.